Yes, I'm still going one day. You are correct, Elvington has suffered immensely in the hands of the RAF participation committee this year, one Tucano is a rather weak commitment. To be fair to the show though, what little they have got is pretty interesting, 4 Hunters, Seafire, Huey are just a few of them.
At least the BBMF are booked for both days, although sadly without the Lancaster (you'd have thought the RAF PC would have thought an airshow at a former Bomber Command base would have been a sensible place to send the Lanc

). Not having the Tucano, particularly with its local connections would have been a PR disaster - but then again not something I'd put past a PR department!
As for the display Hawk, yes, there is more than one. Waddington saw XX307.
Seems sensible. I'm sure for the last few year's they've tried to hove two painted up. Often I think it depends on whether budgets will need to pay for "anniversary" special schemes too.